What are the calculation principles and basic equations of photogrammetry?

Photogrammetry is a science and technology to study and determine the shape, size, position, nature and relationship of the photographed object by using the images taken by optical or digital cameras. The basic principle of photogrammetry is to establish the geometric relationship between image points and corresponding object points at the moment of image acquisition.

According to different research objects, photogrammetry can be divided into topographic photogrammetry and non-topographic photogrammetry; According to the position of camera station or sensor platform, it can be divided into space photogrammetry, aerial photogrammetry and ground photogrammetry. The main task of aerial photogrammetry is to make topographic maps and image maps of various scales, establish topographic databases, and provide basic data for various geographic information systems and land information systems. . * * * Line condition equation.

The transformation between image space coordinate system (S-xyz) and image space auxiliary coordinate system (S-XYZ), and the relationship between image point coordinates (frame coordinate system o-xy) and ground point coordinates (A-XYZ).